<html>
<head>
<script type="text/javascript">
	function getCookie(c_name) {
		if (document.cookie.length > 0) {
			c_start = document.cookie.indexOf(c_name + "=")
			if (c_start != -1) {
				c_start = c_start + c_name.length + 1
				c_end = document.cookie.indexOf(";", c_start)
				if (c_end == -1)
					c_end = document.cookie.length
				return unescape(document.cookie.substring(c_start, c_end))
			}
		}
		return ""
	}

	function setCookie(c_name, value, expiredays) {
		var exdate = new Date()
		exdate.setDate(exdate.getDate() + expiredays)
		document.cookie = c_name
				+ "="
				+ escape(value)
				+ ((expiredays == null) ? "" : "; expires="
						+ exdate.toGMTString())
	}

	function checkCookie() {
		username = getCookie('username')
		if (username != null && username != "") {
			alert('Welcome again ' + username + '!')
		} else {
			username = prompt('Please enter your name:', "")
			if (username != null && username != "") {
				setCookie('username', username, 365)
			}
		}
	}
</script>
</head>
<body onLoad="checkCookie()">
</body>
</html>
